MLA
Platt, Robert B. Black Studies, Administrative Materials - Letter from Robert B. Platt, Chairman of the Biology Department, to Emory President Sanford S. Atwood, Thanking Him for His Speech given at the Most Recent Faculty Meeting - October 1, 1969. 1969. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 10, Folder 4. https://digital.library.emory.edu/purl/836547d954-cor.
APA, 6th edition
Platt, R. B. (1969). Black Studies, administrative materials - Letter from Robert B. Platt, Chairman of the Biology Department, to Emory president Sanford S. Atwood, thanking him for his speech given at the most recent faculty meeting - October 1, 1969 (Box 10, Folder 4) [Letters (correspondence)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/836547d954-cor.
Chicago
Platt, Robert B. “Black Studies, Administrative Materials - Letter from Robert B. Platt, Chairman of the Biology Department, to Emory President Sanford S. Atwood, Thanking Him for His Speech given at the Most Recent Faculty Meeting - October 1, 1969.” Letters (correspondence). Office of the President Subject Files, 1969. Box 10, Folder 4. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/836547d954-cor.